How to Grow Hibiscus syriacus: 4 Propagation Techniques and How It Differs from Chinese Hibiscus

Hibiscus syriacus is a very common shrub flower in gardens. It can be used as a flowering hedge, and is also suitable for planting as a specimen or in groups. It is native to the central provinces of China, and is now cultivated in all regions. It is tough, easy to grow and produces abundant blooms, so many gardening enthusiasts want to plant one in their yard. Today let's talk about the care essentials for Hibiscus syriacus, its propagation methods, and how it differs from Chinese hibiscus.

How to grow Hibiscus syriacus? Remember four points

Soil: Hibiscus syriacus is highly adaptable to soil and is not demanding, growing vigorously even in poor gravelly sandy soil or slightly alkaline soil, though fertile, loose soil is most suitable for its growth.

Light: Hibiscus syriacus likes light and tolerates partial shade. During the growing season it needs plenty of light, but the light should not be too intense, and it must not be exposed to blazing sun. In hot summers it should be shaded appropriately, or moved indoors, to prevent direct strong light from ruining the blooms.

Temperature: Hibiscus syriacus likes warmth, with 18-25°C being the optimal temperature for its growth, and it is also slightly cold-tolerant.

Fertilizing: Apply timely topdressing when buds sprout, mainly with quick-acting fertilizer, to promote vegetative growth; before flowering and bud formation, apply 1-2 more rounds of phosphorus and potassium fertilizer to help with bud formation and blooming. May to October each year is the blooming period of Hibiscus syriacus. During this time, combine weeding and earthing up with two more rounds of topdressing to ensure flower yield and tree vigor.

Four propagation methods for Hibiscus syriacus

Division propagation: Before sprouting in early spring, dig up vigorous mature clumps, take 3 main branches as one clump, and plant at a spacing of 50×60 cm between plants and rows.

Cuttings propagation: From mid-March to early April, do this together with pruning and shaping. Insert cuttings outdoors in red soil or sandy loam, keep the soil moist, and at a temperature of 17°C to 20°C they root very easily.

Sowing propagation: Generally done in April in spring. After the fruit ripens in October, November to December is the best time to collect seeds. After harvesting, extract the seeds and store them dry at low temperature, then sow in drills or broadcast in April of the following spring.

Layering propagation: Hibiscus syriacus branches root very easily. Before sprouting in spring, dig a shallow trench beside the mother plant, lay 1-year-old branches horizontally into the trench and cover with soil, keep the soil in the layering trench moist, and they will soon root and send out shoots.

What is the difference between Hibiscus syriacus and Chinese hibiscus?

First, plant height differs: Hibiscus syriacus can grow to 4 m tall, while Chinese hibiscus reaches about 3 m at most. Second, the blooming period differs: Hibiscus syriacus blooms from July to October, while Chinese hibiscus is in bloom all year round. Third, the origin differs: Hibiscus syriacus originates from the African continent and is now planted in most regions of China, while Chinese hibiscus is originally from China.

Fourth, habits differ: Hibiscus syriacus has stronger adaptability to the environment than Chinese hibiscus, tolerating heat, cold, drought and shade. When grown in northern winters it needs cold protection measures, or can simply be moved indoors; it also has low soil requirements, and can grow even in poor or uneven soil. Chinese hibiscus, on the other hand, cannot do without sunlight at any time and is very intolerant of shade, with weak cold and drought resistance. In the Yangtze River basin and areas to the north, it is only suitable for pot cultivation, and in winter the growing temperature must be maintained between 12-15°C; below 5°C the leaves easily turn yellow and drop, and below 0°C its health is affected. Its soil requirements are also higher than those of Hibiscus syriacus.

Fifth, the leaves differ: Hibiscus syriacus leaves are more diamond-shaped, with the upper edge in an irregular semicircular shape, 3-10 cm long and 2-4 cm wide; Chinese hibiscus leaves are more oval, pointed at both ends, with irregularly serrated edges, 4-9 cm long and about 2.5 cm wide. Master these points and you can tell Hibiscus syriacus from Chinese hibiscus at a glance.